The Umeda Sky Building(梅田スカイビルUmeda Sukai Biru) is the twelfth-tallest building in Osaka,
Japan, and one of the city's most recognizable landmarks. It consists
of two 40-story towers that connect at their two uppermost stories, with
bridges and an escalator crossing the wide atrium-like space in the
center.[1] It is located in Kita-ku. (Wikipedia)The observatory itself is in the bridge, the level itself is doughnut shaped, which flooring are round, so you can have a 360 degree view of Osaka.

This Floating Garden Observatory seems to be designed with romantic themes, the lighting are dim, and there's loads of suggestive decor. The viewing booth are comfy, most of the people using it are couples.

A love lock or love padlock is a padlock which sweethearts lock to a bridge, fence, gate, or similar public fixture to symbolize their love.[1]
Typically the sweethearts' names or initials are inscribed on the
padlock, and its key is thrown away to symbolise unbreakable love. Since
the 2000s, love locks have proliferated at an increasing number of locations worldwide. They are often treated by municipal authorities as litter or vandalism, and are costly to remove.There are varied explanations for the origin of love padlocks. In Europe, love padlocks started appearing in the early 2000s.[2] The reasons love padlocks started to appear vary between locations, and in many instances are unsourced. However, in Rome, the ritual of affixing love padlocks to the bridge Ponte Milvio can be attributed to the 1992 book Three meters above the sky by Italian author Federico Moccia, who later made it into the film-adaptation Tre metri sopra il cielo.[3][4]Similarly, an attribution for the bridge Most Ljubavi (lit. the Bridge of Love—now named after the love padlocks) in Serbia exists, where they can be traced to even before World War II. A local schoolmistress named Nada, who was from Vrnjačka Banja, fell in love with a Serbian officer named Relja. After they committed to each other Relja went to war in Greece where he fell in love with a local woman from Corfu.
As a consequence, Relja and Nada broke off their engagement. Nada never
recovered from that devastating blow, and after some time she died due
to heartbreak from her unfortunate love. As young girls from Vrnjačka Banja wanted to protect their own loves, they started writing down their names, together with the names of their loved ones, on padlocks and affixing them to the railings of the bridge where Nada and Relja used to mee

If you're the romantic kind, be sure to check the Heart Lock here. It's good for both a keepsake, or if you like, put it in the Love Sanctuary area where you can put your love locks, and hope for an everlasting love.